Download 14.10 with zsync - fail.

[Colin Law]

On 24 October 2014 14:26, William Scott Lockwood III <scott at guppylog.com> wrote:
>
> On Fri, Oct 24, 2014 at 8:19 AM, Colin Law <clanlaw at gmail.com> wrote:
>>
>> On 24 October 2014 14:18, Colin Law <clanlaw at gmail.com> wrote:
>> > I am trying to download 14.10 from http://releases.ubuntu.com/14.10/
>> > using zsync, over the previous RC image, this is the result:
>> > $ zsync http://releases.ubuntu.comesktop-amd64.iso.zsync
>> > #################### 100.0% 149.1 kBps DONE
>> >
>> > reading seed file ubuntu-14.10-desktop-amd64.iso: ************...
>> > Read ubuntu-14.10-desktop-amd64.iso. Target 83.6% complete.
>> > downloading from
>> > http://releases.ubuntu.com/14.10/ubuntu-14.10-desktop-amd6  4.iso:
>> > ################---- 83.6% 0.0 kBps aborted
>> >
>> > failed to retrieve from ubuntu-14.10-desktop-amd64.iso
>> > Aborting, download available in ubuntu-14.10-desktop-amd64.iso.part
>> >
>>
>> I should have said that I started a straight download of the image and
>> that seemed to be ok.
>
>
> I downloaded and installed zsync (what does it do that rsync doesn't?) and
> am unable to duplicate the problem. My command line was 'zsync
> http://releases.ubuntu.com/14.10/ubuntu-14.10-desktop-amd64.iso.zsync'
> without the quotes.

zsync uses the same algorithm as rsync but it runs the code on the
client rather than the server so avoiding server loadings.  It is most
useful in tracking things like daily images, run each day it only
fetches the changes to the file since the last time it was fetched.  I
provided the release candidate image as the starting point and it
should only have to download 16% of the file to bring it up to the
release version, as can be seen from the output.

Back to the problem, I find that it runs fine on a 14.04 machine but
not on a 12.04 machine, which is odd.  I wonder if it a zsync version
issue.

Colin